diff --git a/gtsam/3rdparty/Eigen/Eigen/src/QR/HouseholderQR.h b/gtsam/3rdparty/Eigen/Eigen/src/QR/HouseholderQR.h
index e821b9c3d..06be7f4fd 100644
--- a/gtsam/3rdparty/Eigen/Eigen/src/QR/HouseholderQR.h
+++ b/gtsam/3rdparty/Eigen/Eigen/src/QR/HouseholderQR.h
@@ -251,7 +251,7 @@ void householder_qr_inplace_unblocked(MatrixQR& mat, HCoeffs& hCoeffs, typename
 }
 
 /** \internal */
-template<typename MatrixQR, typename HCoeffs, typename Scalar = MatrixQR::Scalar>
+template<typename MatrixQR, typename HCoeffs, typename MatrixQRScalar = typename MatrixQR::Scalar>
 struct householder_qr_inplace_blocked
 {
   // This is specialized for MKL-supported Scalar types in HouseholderQR_MKL.h